The purpose of this second-year project was to investigate the impacts of metals, phthalates and endocrine disrupter substances in wastewater discharged from high-tech industries and their potential adverse effects on source water quality and human health. The project has updated the contents of the database concerning the chemical properties, toxicities and environmental occurrence of the 38 emerging contaminants potentially connected to the high-tech industries. Based on the development of Contaminant Candidate List 3 (CCL3) developed by the United States Environmental of Protection Agency, the Drinking Water Quality Standard in New Zealand, and Contaminants of Very High Concern in European Union, a screening process was proposed to evaluate, assess and screen the contaminant candidates list for chemicals to be regulated in drinking water quality standards. In addition, to evaluate the surveillance of water supply management, the Water Safety Plan of World Health Organization (WHO) and International Water Association (IWA) has been summarized, which can be used by water utilities for assessment of potential risks in their water supply systems. During the study, three advisory panel meetings were called and several related subjects were discussed. The panelists suggested that we should revise the proposed procedures for the screening of contaminant candidate lists, and cautions should be taken before adoptions of the Water Safety Plan of WHO for vulneralbilities assessments of water supply systems in Taiwan.. The continuous investigations into the occurrences of emerging contaminants in drinking water, including the raw water, finish water, and purification treatment procedures, were taken from six water treatment plants located near the Hsinchu and Taichung Science Parks. Furthermore, the groundwater samples from Xiao-Li River and Baoshan Township were also collected and analyzed. The results showed that the metal element, Ga, was detected in several sampling sites and need to be further clarified. Benzylbutyl Phthalate (BBP) and Di(2-ethylhexyl)phthalate (DEHP) were also observed in several samples, including some raw water samples. Since di(2-ethylhexyl)phthalate (DEHP) is highly concerned in public, further investigation is recommended to ensure the safety of drinking water. Moreover, for endocrine disrupters, perfluorooctanesulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) were only appeared at trace levels in water treatment plants, but higher concentration was observed in some groundwater samples.

contaminant of emerging concern, CEC,Safe Drinking Water Act, SDWA,Maximum Contaminant Level, MCLs,Best Available Technology, BAT